"Affecting 30,000 people in the United States alone," The Sun reports, "cystic fibrosis is an inherited disease that causes the body to produce thick, sticky mucus that can clog the lungs and damage the pancreas, interfering with the body's ability to absorb nutrients.

CHETRY: So, this does allows you to, in some cases, really circumvent what could be a lifetime of pain for a family if they have a child who eventually gets something as devastating as cystic fibrosis, which is genetic.

"Of particular benefit, the ELF test can help to identify patients with mild-to-moderate liver fibrosis, which is usually asymptomatic, so that clinicians are able to intervene before significant damage to the liver occurs."